code: def render_kernel(
      self,
      function_name: str,
      kernel: List[str],
      bufs: List[Tuple[str, DType]],
      local_size: List[int],
      prekernel: List[str],
  ) -> str:
      tmp = (
          "const sampler_t smp = CLK_NORMALIZED_COORDS_FALSE | CLK_ADDRESS_CLAMP | CLK_FILTER_NEAREST;\n"
          if any(isinstance(dtype, ImageDType) for _, dtype in bufs)
          else ""
      )  # noqa: E501
      buftypes = [
          (
              name,
              f"{'read_only' if i > 0 else 'write_only'} image2d_t"
              if dtype.name.startswith("image")
              else ("const " if i > 0 else "")
              + self.buffer_prefix
              + self.render_dtype(dtype)
              + "*"
              + self.buffer_suffix
              if isinstance(dtype, PtrDType)
              else self.arg_int_prefix
              if dtype == dtypes.int
              else None,
          )
          for i, (name, dtype) in enumerate(bufs)
      ]
      prg = "".join(
          [
              f"{self.kernel_prefix}void {f'__launch_bounds__ ({prod(local_size)}, 1) ' if self.launch_bounds else ''}{function_name}(",
          ]
          + [
              ", ".join(
                  [f"{t} {name}" for name, t in buftypes]
                  + self.extra_args
              )
          ]
          + [") {\n" + tmp]
          + ["\n".join(kernel), "\n}"]
      )
      if self.half_prekernel and any(
          dtype in [dtypes.float16, dtypes.bfloat16]
          for _, dtype in bufs
      ):
          prg = "".join((self.half_prekernel, "\n", prg))
      return prg
  
imports: from typing import Dict, List, Optional, NamedTuple, Tuple, Union, DefaultDict, cast, Literal, Callable
  import math, functools
  from collections import defaultdict, Counter
  from tinygrad.codegen.linearizer import UOps, UOp
  from tinygrad.ops import UnaryOps, BinaryOps, TernaryOps
  from tinygrad.helpers import prod, strip_parens, getenv
  from tinygrad.dtype import ImageDType, dtypes, DType, PtrDType
label_desc: Use image node_id 7 for calling the CStyleLanguage obj's underlying member method code with example usage: obj.render_kernel(function_name, kernel, bufs, local_size, prekernel) and returns: prg